16 June - NSW CCC Cross Country, CSDA Debating Elimination 1, Year 12 Ancient/Modern History Excursion
16 - 17 JUNE - COLLEGE MUSICAL AT ST GREGORY'S COLLEGE
19 June - Year 11, 2018 Information Night, Year 11 and Year 12 Vaccinations
21 June - Year 7 - 9 Cyberbullying Pastoral Incursion, Year 12 Biology Excursion 
22 June - Dio CCC Basketball Playoffs, MISA Debating, Winter Sleepout 
23 June - Year 10 Community Service Incursion, GDay, CSDA Debating Quarter Final
26 June - NAIDOC Assembly
28 June - NSW Oztag
29 June - HSC Dance Evening
30 June - Benedict Day, Mass, STAFF AND STUDENTS FINISH FOR TERM 2
17 July - Staff Return for Term 3
21 July - CSDA Debating Semi Final
24 July - STUDENTS RETURN FOR TERM 3, DIO Netball
25 July - College Assembly
26 July - Year 8 Italian Excursion, Year 11 SOR Excursion
27 July - MISA Debating
28 July - Mater Dei Feast Day, Year 11 Hospitality/Business Services Excursion
31 July - 14 August Year 12 Trial Examinations 
1 August - Middle School Parent Forum, ANCQ Chemistry Quiz
3 - 4 August - Year 11 2018 Subject Selection Interviews
4 August - Year 9,10,11 AIME Excursion, CSDA Debating Grand Final
8 August - Senior School Parent Forum
9 August - Year 9 English Incursion
10 - 11 August - Year 11 Leaders Camp
11 August - Year 11 Dinner Dance at St Gregory's College, Year 5 & 6 STEM Challenge
14 -18 August - Science Week
15 August - CCC Netball Championships
16 August - Year 9 2018 Information Evening, MISA Debating
18 August - Dio Athletics Carnival